Answer:
What is so fragile that saying its name breaks it?
The 8 of us go forth and not back to protect our king from a foe's attack. What am I?
I am the key that is the hardest to turn
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
Though not a plant I have leaves. though not a beast I have spine. Though many wouldn't need me I am more valuable than wine.
A man goes out in heavy rain with nothing to protect him from it. His hair doesn't get wet. How does he do that?